[ncl-talk] RasterFill transparency

[David Brown]

Yes, of course. We will let you know when we solve this issue.
 -dave

On Thu, Sep 11, 2014 at 1:40 PM, Alan Brammer <abrammer at albany.edu> wrote:

> Thanks Dave. Interesting that that work around exists. Unfortunately
> doesn't apply in the actual use I have in mind but it's fine for now. If
> it's possible to stay informed of any progress I'd appreciate that.
>
> Alan.
> On 10 Sep 2014 19:06, "David Brown" <dbrown at ucar.edu> wrote:
>
>> Hi Alan,
>> I have been looking at this issue and there is clearly something wrong.
>> The only color that seems to be completely transparent when set for a
>> raster fill plot is transparent black (0,0,0,0). That does mean there is a
>> work-around fix for your specific test case: just change line 63 from
>> reds(:30,3) = 0.
>> to
>> reds(:30,:) = 0.
>>
>> We will figure out the overall issue as soon as possible.
>>  -dave
>>
>> On Tue, Sep 9, 2014 at 4:26 PM, Brammer, Alan P <abrammer at albany.edu>
>> wrote:
>>
>>>  ​Sorry -- That first link was the wrong paste:
>>>
>>>
>>> http://www.atmos.albany.edu/student/abrammer/transtest/transtest_RasterFill_FillOpac.png
>>> ​
>>>
>>>
>>>
>>>  Alan.
>>>  ------------------------------
>>> *From:* ncl-talk-bounces at ucar.edu <ncl-talk-bounces at ucar.edu> on behalf
>>> of Alan Brammer <abrammer at albany.edu>
>>> *Sent:* Tuesday, September 9, 2014 5:34 PM
>>> *To:* ncl-talk at ucar.edu
>>> *Subject:* [ncl-talk] RasterFill transparency
>>>
>>>   Ran into an issue today that probably requires some developer input.
>>>
>>>  Objective 2 shaded contour plots, with variable transparencies to view
>>> 2 variables on top of each other.
>>>
>>>  This works as desired in CellFill but is not aesthetically pleasing
>>> due to the blockiness.
>>> AreaFill also works but has some weird vertical lines that pop up in
>>> random places (and takes an age to plot).
>>> RasterFill does not seem to support RGBA with cnFillPalette or
>>> cnFillColors a halfway workaround works with cnFillOpacityF  but following
>>> on from the thread the other day this only works with all or none of the
>>> colors.
>>>
>>>  So main question should/can RasterFill support the A in RGBA
>>> colortables.  It seems the functionality is there just maybe a break in the
>>> chain somewhere.
>>>
>>>  plots:
>>>
>>> RasterFill w/ cnFillOpacityF  semi transparent everywhere   -->
>>>
>>> http://www.atmos.albany.edu/student/abrammer/transtest/transtest_CellFill.png
>>>
>>>
>>>  Cell-fill  What I want but without the blockiness   -->
>>> http://www.atmos.albany.edu/student/abrammer/transtest/transtest_CellFill.png
>>>
>>>
>>>  RasterFill w/ RGBA  same resources as cell-fill but fails completely.
>>>  -->
>>>
>>> http://www.atmos.albany.edu/student/abrammer/transtest/transtest_RasterFill_rgba.png
>>>
>>>
>>>  Code, data and plots here:
>>> http://www.atmos.albany.edu/student/abrammer/transtest/
>>>
>>>
>>>  Trialed using both 6.2.1 and 6.2.0
>>> on  x86_64-redhat-linux with gcc version 4.1.2
>>>
>>>  Thanks,
>>> Alan
>>>
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>>>
>>
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